A market in which the entire demand for a good or service can be satisfied at the least cost by a single firm is a:

If the variable on the vertical axis increases by 20 and the variable on the horizontal axis increases by 5, the slope of the line is

A) 0.25. B) 4. C) 15. D) 100.

President Franklin Delano Roosevelt declared a bank holiday, closing all U.S. banks in ________

A) July 1776 B) October 1929 C) March 1933 D) September 2001